This is Unveiled, and today we’re counting down enduring mysteries from the mists of prehistory. This famed prehistoric monument located in Wiltshire, England, was constructed around 5,000 years ago. Its origins have been a topic of speculation, with conjectures including an astronomical observatory, a religious site, or a place for rituals. Recent archaeological findings suggest Stonehenge may have been part of a larger sacred landscape, including nearby burial mounds and ceremonial pathways. The transportation and erection of its massive stones, some weighing up to 25 tons, remain an impressive feat, considering the limited technology of the time. The alignment of the stones with the solstices suggests a connection to celestial events. Stonehenge's design and construction exhibit a sophisticated understanding of mathematics and astronomy by its builders. The timing and route of the first human settlement in the Americas have been subjects of extensive research and discussion among archaeologists and anthropologists. While the traditional theory suggests migration from Asia to North America via the Bering Land Bridge around 13,000 years ago, recent discoveries challenge this timeline. Sites like Monte Verde in Chile and Bluefish Caves in Canada suggest an earlier presence, potentially predating the Clovis culture. These findings imply alternative migration routes, including coastal or island-hopping paths. Genetic studies have added complexity to the debate, indicating multiple waves of migration. Understanding the initial peopling of the Americas sheds light on migration patterns and the adaptation of humans to new environments. This cave in southwestern France is renowned for its Paleolithic paintings, estimated to be over 17,000 years old. These paintings depict a variety of animals, human figures, and abstract symbols, showcasing a high level of artistic skill for the time. The purpose of the paintings is unknown, with potential explanations ranging from religious or ceremonial functions to expressions of early storytelling or documentation. The cave's discovery in 1940 provided invaluable insights into Upper Paleolithic life and art. The variety of animals painted, including horses, deer, and large cats, indicates a rich biodiversity in the region during that period. The paintings also raise questions about the symbolic and communicative abilities of early humans and their relationship with their environment. Neanderthals, a distinct species or subspecies of archaic humans, lived in Eurasia until approximately 40,000 years ago. Their disappearance coincides with the arrival and spread of anatomically modern humans in Europe and Asia. Various attempts have been put forward to explain their extinction, including competition for resources, climate change, and a lower reproduction rate. Genetic evidence shows interbreeding between Neanderthals and modern humans, with traces of Neanderthal DNA present in the modern human genome. The Neanderthals' ability to create tools, use fire, and possibly have symbolic thought and language indicates a high level of cognitive and cultural complexity. Their disappearance marked a significant event in our evolution.